Hey guys, new to the site hoping you guys can help. I've been searching the forums for weeks to no avail. I have a 2006 6.0 just rolled 200k. My problem started a few months ago, it started missing when it shifted into overdrive after the vehicle has set and cooled. Once it reached normal operating temps the problem went away. Now the miss has become more prominent at all times and will sometimes still go away once the truck warms up, and will always clear up if I am on the road for a long trip. I am thinking a sticky injector but before I tear into it I wanted to get some other opinions. I have checked the FICM voltage and it reads good at 48v, I am also 1k miles into a fresh oil change running Hot Shots Secrets and haven't seen any improvement, no smoke from exhaust and aside from EGR delete and SCT tuner I'm running stock. So any help or ideas will be appreciated.
2004 F-250 Lariat, 6.0, SCLB, 4wd, Magnaflow turbo-back, EGR delete, studded, 6.4 banjo, new oil cooler and HPOP as of 5-11-2014 To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Had Already Ordered an Auto Ingenuity with the enhanced ford features prior to posting. I haven't been able to troubleshoot do to the weather up here being lousy, but get this I get in to head home from work yesterday evening and the truck ran just a smooth as ever, and same thing this morning temp was 18 degrees this morning, I had forgot to plug it in last night, went out expecting trouble but it cranked for about a second and fired right up, no rough idle or miss on the way into work. fully scanner will be here today so I can get some data and see whats might be going on.
Could be hpo leak or fuel related. One thing with the ae doing a contribution test you don't get a true test due to you can't turn off the system help to get a true reading. Only ids or similar can do that. Of course other than the ae you need something to use daily as you drive to monitor things as well. Shouldn't be flying blind driving a 6.0. It couldn't cost you imo.
2006 F350 4X4 CAB CHASSIS w/ Truck Bed
Blue Spring, Mishimoto tstat
Sorry it took so long to update with any information. I finally resolved my issues after wasting some time. I received my Auto Ingenuity and started right away trying to identify my problem, according to all of the numbers there was no problem aside from a low circuit on number one injector. (And if you want to do a cylinder contribution test buy something other than AI it doesn't work for that test) Anyways after finding all HPO pressures and FICM voltages were what they should have been. I decided that there had to be trouble with the injectors themselves.
First step I decided to try taking the cheap route and just order the O-Ring kits for the injectors. The reason being is all injectors passed the Buzz test I thought well maybe I’ve got a bad seal somewhere. I pulled all of the injectors and disassembled them removing the nozzles and ran them through my ultrasonic cleaner and re-assembled them, they looked brand new. After getting everything back together the truck started and idled as smooth as you could as for. Let it the temps come up to operating levels verified no fluid leaking and "tried" to go for a test drive. Once the truck went into drive the engine didn't have the power to pull itself out of the driveway, that’s when I noticed it was building no boost. Well as you can imagine I'm pretty pissed I just wasted the whole weekend.
So I start making a few phone calls and get with a buddy that is a young diesel mechanic tell him what all I've done. Bouncing ideas back and forth we zero in on the injectors again and he recalls an article that once a 6.0 injector nozzle has been removed it has to be setup on a flow bench and re-calibrated, simply torqueing it back to the specs I found won’t guarantee it’s correct. So lesson learned I ordered new injectors, I installed them and truck is running amazing, mileage on the highway is currently hitting 22mpg (with STC Tuner) and all symptoms that I had are gone.
If anyone has any questions or your experiencing something similar I would be happy to try and answer any questions that can help you get it fixed, I beat my head against the wall for months trying to get to the cause with no real help in the forums, as it seemed the symptoms were indicative of the typical FICM and HPOP.